USRE14805E - Illuminating device for projecting purposes - Google Patents

Description

S. E. DOANE, R. P. BURROWS AND A. F. SINCLAIR.

ILLUMINATING DEVICE on PROJECHNG PURPOSES.

Rissued Feb. 17, 1920 APPLICATION mm JAN 21. as

APPUCATIOI FILED 0C1; 25, I919.

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ILLUMINATING DEVICE FOR PROIECT lNG PURPOSES. ROIBSHOd Feb. 17, 1920. APPLICATION men JAN. 2| I9l6. -APPLICATION FILED OCT. 25. 1919.

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S. E. DUANE; R. P.-BURROWS AND A. F. L-INCLAIR.

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APPLICATION FILED OCT. 25. I9I9.

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PATENT OFFICE.

SAMUEL EVERETT DOANE, ROBERT P..BURROWS. AND ARCHIBALD F. SINCLAIR, OP- CLEVELAND, OHIO, ASSIGNORS TO GENERAL ELECTRIC COMPANY. A CORPORATION 01 NEW YORK.

ILLUMINATING DEVICE FOR PBOJECTING PURPOSES.

14,805. ori ami No. 1,315,321. dated I ()hio. have invented certain'new and useful shifting the lamp housing ll])t)ll ill( failure. of the lamp in immediate use. As applied Improvements in Illuminating Devices for Projecting Purposes. of which the following is a specification.

()ur invention relates to illuminating de- \ices constituting parts of picture projection apparatus, and more particularly to housings including the supports for the light projecting elements. such as the light; source. reflector and condenser. which are ortlinzirilv included in such devices. In the specification we have used the expression lamp lions ing" to indicate the apparatus comprised h our invention. ()ur lamp housing particularly adapted to the use of an electric. im-andescent lamp as the light source. The ohjeet of our invention is to provide a device of this character which will permit oi the quick replacement of lamps when net-es sar aml which will also permit a ready and accurate adjustment of the light .projecting elements.

According to our invention. we provide within the lamp housing supports tor a plui'alit v ot' incandescent lamps aml means \\'he.reh one lamp may be readily substituted for another in operative relation to the rest of the picture projecting apparatus. In its pi'el'errial form our invention comprises a lamp housing having at each end thereof alt incandeswent lamp and means for concentrating and directing the light. therefrom. The parts at both ends of the lamp housing are preterahlx syininetrically disposed with reference to an axi passing through the ceiitor of the lamp housing. and the lamp housing is so mounted thatit may he rotated upon this axis to hring the parts contained at either end thereof into accurately spaced relation with the other elements of the projection apparatus. ;\ll'll()ll; {l)*:lt' is ordinarily sullieiently effective to liarej the lamp housing shifted manually. toseeiire the desired Huhstitntion of lamps. our invent ion also includes the use. of an automatic means for section of the lamp housing.

Specification of Reissued Letters Patent. Roissuetl Feb. 17, 1920.

September 9, 1919. Serial Ila-73342. filed January 21. 1916. Application for reissue filed October 25. 1919.

Serial No. 333.881.

to the aforesaid rotatahl mounted housing. the said automatic shifting comprises means for automatically rotating tlie housing upon the failure of the lamp which is in immediate use and means for automaticall stop )ing the said rotation when another lamp has-l. een properly substituted for the lamp which has failed. tages of our invention will appear from the detailed description of a species and modifications thereof which follows and from a reference to the accoin nin \'ing drawing.

In the drawin Figure l is a diagraniinatic view showing in proper assembled re lation the parts of a moving pictureprojecting apparatus. Fig. 2 is a partial horizontal section of the lamp housing showing atop plan of the lower plat form and attachments forming part thereof. Fig. is a transve vertical section through the housing. Fi l is a partial vertical section on the haul-4 of Fig. 2. Fig. 5 is at longitudinal vertical partial horizontal section of thelanip housing showing the top plan of the upper platform and attachments. Fig. I a vertical sti't'lflll through the mechanism for a\\toinatirally rotating and stopping the lamp hous- .8 0

Various other features and advan- 6( Fig. (3 is i115 ingx Fig. 8 is an end elevation of the same parts. Fig. 1) is a diagram of the electric circuits comprised in the apparatus.

.\.-; shown in Fig. l. the moving picture apparatus comprises the lamp housing 10,85

containing the illuminating portion ofthe apparatus with which our invention is eon eei'ned. The light projected.from the said lamp housing is directed through the lilin 11. which travels from the upper reel 12 and the lower i'eel l -l through the. idlers Li and the aperture plate 15., After passing through the tilin light rays pass through the ohjec the 16. which redirects them upon the Referring now to Fig.

seieen (not shown). 5 in the drawing, it will be seen thatthe lamp housing 10 carries at; each end thereof a set ot' light projecting elements including the incandescent lamp 17. the reflector 18 and the condenser l these elements and their relative arrangrr. ment is disc osed in the am'ilieation ot' John B. Taylor. Serial No. 35,768, tiled June 23, 1915, which is assigned to the same ussignee The Qlitlflfi? construction oi as is the present invent-ion. The incandes cent-lamp 17 campriscs the coiled filament .20, which, as shown in Fig. 3 has two parallel branches 21 lying in the same vertical plane. As disclosed in the Taylor application above referred to, the filament 20 is so disposed with relation to a horizontal axis passing through the center of the spherical reflector 18 and the condenser 19 that a real image of the said filament is reflected back to occupy a position in the same plane as the said filament but slightlyofiset so that the image of a branch of the coiled filament will be located between the branches 21 'of the filament, and thus a. practically continuous area of light source is produce The lamp l7 ,and its socket 22 are carried by a. vertically disposed stud 23, which is .exteriorly threaded, and the lower end of which extends within and engages with an. interior thread on a. bushing 2-1 su ported by and extending within the gear- 7 said interior. thread bei shown in dotted lines in Fig. 2 as 26. e portion ofthe bushing 24 which is within the gear-box 25 has rigidly attachedthereto and circumferentiagily thereof a inion 27. dThis is engage by a vertica ,dis se pinion 28, which is mounted upon tlre liorizontally extending-rotatable rod 29, which is supported by thev gear-box .25, and extends transversely-of the housing. through a slot therein. other end thereof a knob 31. By turning the knob 31 the vertical position of the lamp 17 and of its filament 20 may be accurately adjusted. The gear-box 25, which carries the aforesaid arts. is mounted in a transversely extending slot 32 in a table The latter is grooved on both sides at 3% and slidably engages the extensions of a lower platforu r 35 supported near the bottom of 'the housing. A rotatable rod 36 carries at one end a pinion 37 which engages a stationary rack 38 on an extension of the platform '35. The said rod is supported in bearings 39 on the table 33, extends through a slot 40 in the side of the housing, and has at the outer end thereof'a, knob 40. It will be apparent that by rotatingthe knob 40 the longitudinal position of the lamp and its filament may- 10 accurately adjusted. The sides 41 of the gear-box 25 are perforated toem gagcwitha tliread 42 at one end of the horizontally disposed rota'ltaible rod iil'rnou'nted in bearings 44 on the table 33. The other end of the saidrod extends through a slot I 43' and carries a knob 45. It will be apparent that by properly turnin the said knob the transverse position 0 the lam and its filament may be accurately adjuste The platform 35 is secu'red'to the casing 10, as t 46. The housing as a whole is rotatably mounted upon a centrally disposed vertical shaft *7, which is stationary, being at The said carries at the tached to a tripod table (not shown) or simi* lar support by a fastening 48. The housing is attached to a collar 49 loosely mounted on the said shaft and supported by stationary bearing 50. The shaft 47 extends up through the casing 10 and there is preferably provided at the top thereof a means for rotating the housing, especially when automatic means are cur loyed for bringing such rotating means into action upon the failure of a lamp as hercinbefore described. This rotating comprises a spiral spring 51, one end of which is secured to the stationary shaft 47 at 52. and the other end to a cover plate 53 loosely mounted on said shaft. The lower edge of the member 53 is serrated, the teeth-thereof engaging teeth on ratchet 54 fast to the housing. It will be apparent that the spring 51 may be wound up by turning the member 53 and that upon the release of a stop which normally holds the housing in position the said housing will.

be rotated. The stop used in the form equipped with the automatic attai'rhment hcrcinbefore referred to is shown in Figs. 3, 7 and 8 and comprise slidable pin 55 and.

spring pressed slidable grips 55.

The platform 35. as shown particularly in Figs. 2 and 4, carries at the rnidd'leportion thereof and on each side pairs of U-shaped contacts 56 and 57 suitably separated there i from by insulations 58 and 59 respectively The ccntm'lshaft 47 has a collar-"60 rigi' y attached thereto which supports pairs of stationary knife- blade contacts 61 and 62,

insulation 63 separating the same from. the said collar. The pair of contacts 56 and 57 j are each connected to a socket for one of. the

incandescent lamps by suitable leads .(not shown). Each pair of the stationary contacts (i1 and 62 is connected to the energy lar in shape to the platform 35 and is providcd at each end with extensions receiving the table 65, the sides of which are grooved at 66, and which slidably engage with the platform extension'at that end. The table 65 is transversely slotted at 67. A holder 68 is slidably supported by the table in the said slot, the said holder being vertically recessed to receive the extension rod 69 attached to the reflector 18. A set screw 70 cngagcs with thesaid rod. thus allowing theposition of the reflector to he vertically adjusted The portion of the holdcr (8 extending above the table 65' has a rearwardly extending flange 71 through which passes the threaded endof a set screw 72 rotatably supported in bearings 73 upon the said table, and extending throu h a slot 74 in the'sidc of the ,casing. It wil be apparent that by suitably turning the set screw tlie'refiector may be transversely adjusted. A rack mounted on the platform (it eater. is adjacent to the table 65 and is en "iged by a pinion 76 at the end of a rotatab erod 77 suppoited in bearing 78 on the said table. The said rod extends through a slot 79. It will'be apparent that by properlyturning the said rod the reflector may be longitudinally-adjusted.

.The electric" sup ly circuits for the lamps 17 at each endfoi .tlie housing are shown diagrammatically in h ig. 9. A transformer 80 supplies current at a comparatively high voltage through the leads 81 to the leads 82, which are connected to the stationary contacts 61'with which the movable COI'lttlCtSMi connected to that lamp 17 which is in immediate use-engage. The transformer '80 also furnishes currentf at a comparatiyely low voltage through tothe stationary contacts sewn e movable contacts 57 connectedto lthat mp 17 which is not in use engage. Ttisapparent that this portion of the supply circuit may be omitted. However, it is desirable that means be provided for lighting up thatla'mpl? which is not in immediate use SoJ'thatQnQE-may be properly adjusted to beready-for such .nse when called upon. .It isnotnecessaryjhat the lamp be illuminated to its fullest'e'xtentfor this pun, pose, and, therefore, the Voltage of the current supplied is preferably-low. However. this is' notimperatiiief; ouble :contact switch 84 may.-be;;-piioir,ided current when p '1 It will pare n ha't' tluit portion of the apparatus. shown whieh 'is described above IS suficient' for practical operation with or without-the sprmgrotating device or the stop mechanismheretofore dcscribcd. In such case wheneyer ajlamp fails or it is desired to substitute another lamp for any reason, the housi'ng niay be readily rotated manually to-bring theiother lamp into open ative relation with the rest of-the picture projecting apparatus... However. in'the form shown anautomatie meansisprovided for effecting the operation upon the failure of the lamp. F orthis purpose there is included in series with the lamp in immediate use the winding of thesolenoid 85. The winding of another solenoidfih is connected in shunt with. the supply circuit for this lamp 1-7. The pin 55 constitutes an arnuituic con trolled by the solenoid 86. The winding of the said solenoid is connected to the )uetal' casing 87 of a dashpot having therein a piston $9 from which extends a contact 89 nor nmlly resting upon the contact 90, which is apertured in." line with the core of the solenoid 86 and-'carrics at its outer end a contact 91 which is in line with the armature of the solenoid 85. The armature 92 is connected by means of a lead 9? to a contact M which is engaged by an extension l of the switch 8-} when the latter is in closed position. 'lhc winding of the solenoidhii is councctcd ut H6 to oneof the Imus-.3.-

' Normally the. armature H2 is hcld b thc solenoid out of cngzigcmcnt with lhc con tact 91. l pon thefailurc of thc lamp ii in immediate use thc solenoid H5 is dci ncrgizcd and the armature 9-2 fulls---into cngngcnlcnt with the contact i l. 'lhis colnplctcs thc circuit through the solenoid 86 which raises th in 55 out of engagement with the spring liolding member 55. The springol thcu causes the rotation of the housing until the other pin engages with the holding menu- 55'. The other lamp is thus substituted in operative rclatioirand the solenoid 55 is recnergizcd drawing up' the armature 92 and breaking the circuit through the solenoid 8h. The said solenoid has been previously dcencrgized by reason ,of the pin .35 striking against the contact S9 causing the piston Rh to rise in the dashpot T. The contact graduallyreturns into engagement with thc contact 90. but the operation. is so timed that by that time the circuit has been broken through the solenoid S6 and the rclcnsc of the pin 55 will not be re 'icated.

Various changes and mmhhcations of the above described apparatus will readily suggest themselves to those skilled in the art.

but these are to be considered as coming wlthin the scopeof our invention, which is j set forth in the following claims. cutting otf'the "hat we claim as new and desire to secure by Letters Patent of the United States, is:

'1. In a picture projection apparatus the combination of a plurality oi electric lam is adapted to be placed one aftcr thcother Ill operative relation with the lens system. a plurality of universally adjustablc supports for said lamps whereby each huup may be accurately, and individua|| adjusted with reference to said lens system. means for lighting t lamp not at the time in use for focally adjusting the same, and mcans whereby the adjusted lamp may be substituted for'the lamp in use at the will of the operator.'

2. In a picture projection apparatus the combination of-a p ura'lity of electric lamps adapted to be placcd one after the other in operative relation with thelcns system, a plurality of universally adjustable supports for said lamps whereby-each lamp may be accurately and individually adjusted with reference to said lens system. means for combination of a plurality of electric lamps adapted to be laced one after the other in operative relation with-'the-lens system, a )lurality of adjustable supports for said lamps whereby each lamp may be accurately and individually adjusted with reference-to said lens system, means for lighting a lampfnot at the time in use for focally ad'ulstsigrg the same, and means whereby the a j at the will of the operator.

49 In a picture projection apparatus, the combination of a plurality of electric lamps adapted to be placed one afterthe other in 0 rative relation with the lens system, a

purality of. adjustable supports for said mps whereby each lamp may be accurately and individually adjusted with reference to said lens system, means whereby each lamp same and means whereby an adjusted may be substituted for the lamp in use at the will of the operator. s

5. A lamp fixture for projecting appah ratus comprising a relatively fixed part,'a lamp support movably mounted thereon, 'a

plurality of lamps carried by said support and so positioned thereon that either lamp maybe brought into operative position'by movement of said support, means for separately adjusting said lamps relative to said support, reflectors for'each of said lam 's,

and means for adjusting said reflectors in e-" pendently of said lan}ps and of "said support;

6. A lamp fixture r projecting purposes comprising a table mounted for rotation, incandescent lamps carried by said table at difl'erent points circumferentially thereof, each of said lamps being mounted on a part having a radially adjustable connection with said table, and means for separately adjusting said lamp carrying parts.

7. A lamp for projecting apparatus comprising a rotatable table. radially adjustable slides carried by said table .at diametrically opposite points, a second slide carried by each of said first mentioned slides and adjustable transversely thereof, and incandes andiradially of said table. lamp may be substituted'lfor'the lamp in-uee j 1 cent electric lamps carried by said second slides.

8. A him for projecting purposes comprising a ta le mounted for rotation, a plurality of lamps supportedby said table to be brought by rotation thereof to the same operative position, and means for separately adjusting said lamps both circumferentially 9. A lamp for projecting-apparatus com prising a table mounted for 'rotation, a 'plurality of lamps supported b said table to be hroughtby rotation thereo' tethe same operative position, means for separately adjusting said lamps both circumferentially and radially of said table, and separate reflectors for each of said lamps, said reflectors being adjustably su ported independently of their respective amps. may be focally adjusted prior to using the amp 10. A lamp for projecti apparatus com prising'a rotatably moun p table, a lurality of lamps supported by the table or adjustment by rotation of th q'table to the same pperative position, said table comprising a ower lam -supporting ,an upper part rigidly coiinected to said lamp-supportm part and extending above said lam s, an separateereflwtors for each of sai lamps suspended from said upper part.

11. A lamp for'projecting apparatus comprising a rotatable table,' a plurality of lamps supported by the table for adjustment by rotation of the table to the same opera tive position, said table comprising a lower lamp-supporting part, an upper part rigidly conn'cwted to said lamp-supporting part and extending above said lamps, separate reflectors for each of said lamps suspended from". said upper part, adjustable connections between said lamps and saidtable, and separate adjustable connections between said re- 1 flectors and-Said table.

In witness whereof wehave hereunto set our hands'this 17th day of January, 1916-.

' SAMUEL EVERETCl DOANE. ROBERT P. BURROWS.

ABCHIBALD F. SINCLAIR.

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